Alarm device



Y .1. D. scHuLTz ALARM DEVICE Filed Feb. 5, 1924 ATTORNEY.

Patentedy Oct. 2,` 1928.

UNITED STATES..

Josirnn D. scHULTz, 0F MOUNT CLEMENS, MICHIGAN.

ALARM DEVICE. e.

Appncaun.inedl February 5, 1924.' serial n. 690,811.

This .invention relates to an improved alarm for use 1n connection with automobilesand one object ofthe invention is to provide an alarm which may be mountedupon the car and'have a flexible drive shaftrv rotated from the gear used for operating the speedometerl and serving to intermittently sound an alarm when' the automobile is `moved, by someone trying to steal the automobile.

Another obj ect of the inventionjisto so conystruct this device that it will operateif the automobile isv driven by its vown power or it is towed awa 1. n

` Another obJect o f the invention is to so construct this device that the signal, battery. control switch and contact'` which `is to beoperatively connected with the shaft leading to Athe speedometer gear may all be positioned r1n a single casing thereby providing asingle mechanism which willjbe protected from being tamperedwith and'which will further conffititute a compact mass appearing as a single unit and easy to put in place.v

Another object of the invention is to so construct this signal that theU lock-'operated switchniay be set by means of a key inserted and removed throughthe wall of the outer casing thereby permitting the owner of the automobile toeasily put the key in place or remove it when desired.

Another object of the' invention is to so Construct this signal that it Will comprise a comparatively few number of parts practically all of which will be positioned within the outer casing and will not be liable to readily get out oforder. e

This invention is illustrated in the accompanying drawings, wherein:

Figure l is a view showing a portion of an automobile with the improved alarm signal associated therewith.

' :Figure 2 is an venlarged sectional view through the signal.

Figure. 3 is a transverse sectional taken along line 3-3 of Figure 2. j

This improved signal is for use in connection with an automobile and is to be operated View 1 from thek gear vl usually provided upon one of the wheels 2 of the automobile and serving to operate the speedometer usually provided upon an automobile. The drive shaft 3 for this signal extends through a'fstrong metal tube 4 and at its outer'end carries a gear 5 which meshes with the speedometer operating gear l. This shaft 3 will be of the usual flexible construction and the tube and flexible shaft may be of any suitable length so that when putin use the main box or outer casing 6 may be secured in place within the engine .hood or at any other desired point upon the body of the automobile.

This outer casing 6 may have its Walls and top and bottom formed of heavy sheet metal o'r may be formed as gratings so that the sig nal may be ,easily heard. The cover may be hinged or removably mounted and releas'ably secured in anyv desired manner so that access may be had to the interior of the boX or casing when necessary. The top or one wall of the casing has been provided with an opening 7 so that the flexible shaft r3 and tubing 4 for this shaft may extend through this opening 7 and into the casing.

, Within the casing 6 there has been Apro`r vided a switch box 8 which is secured to the bottom of the box and Vhas its upper end provided withv an opening 9. Contacts l() are provided in the side walls of the switch 4box andare adapted to be' engaged by heads l1 formedl at the endsfof a` flexible arm l2 which is carried by a shaft 13 rotatably mounted in the switch box. The upper end of this shaft 13 is forked, as shown at 14., and secured to the lower end of a block l5 which is preferably formedof wood or fiber and extends upwardly through the opening 9 in the box 8 and is connected with the fork 16 provided at the inner end of the flexible shaft 3. kThis prevents contact being made between the box and the shaft 13 or flexible shaft 3. The box 8 may be formed of insulated material or it may be formed of metal in which case the contacts 10 would have to be insulated from the body of this box. y It will be readily seen that as the shaft 3 rotates the shaft 13 'will be rotated with it, and therefore the cross arm or bar l2 will be turned so'that the heads l1 provided at its ends may brush across the n inner ends of the contacts l0 andthe cross bar, which 1s preferably formed of copper, serve as a bridge connecting these contacts.

In order to sound an alarm when the auto-v et the source of power and a wire 22 leads 'from the second contact l0. These wires 2l and 22 are connected. with termina-ls ot' a switch Q3 which is ot a conventional keyoperated construction and will be secured to one wall ot' the casingl G with the key-receiving portion extending through the wall thereby permitting the operator ot the automobile to insert the key ll into the kejv control switch from a point externally ot' the casing.

Vr'hen this device is in use the box or casing G will be secured at an y desired point upon the automobile and the Flexible sha'tt and tubing el for this shatt *ill be led to the wheel having the speedometer operating gear connected therewith; 'l'he gear 5 will be connected with the tlexible sha'tt atteithis shal't and its casing l have been Cut the proper length and the gear will be suitably,Y mounted to mesh with the gear l. lt desired, a easing may be provided about the gears l and 5 to protect them and ot course this casing will be )rorided with an opening to receive the tubing l and flexible shatt 3. 1.Vhen the device is in place the ke)v 2l can then be inserted and the key control switch turned to break connection between the conductor wires 2l and The automobile can then be operated in the usual manner without the signal being sounded. `When the drivel' leaves the car the key will be removed and the switch 23 will then be operated to establish connection between the wires 21 and Therefore, it' an unauthorized person attempts to move the automobile by driving it oli' under its own power or by towing it, except by means of a rocking device which would held the iront wheels elevated, the device will be in operation and as the crossl arm l2 turns with the shaft 13 the heads 11y ot this cross arm will engage with the contacts l() thereby permitting the current to pass through the cross bar and complete the circuit. rl"he bell will therei'ore be caused to intermittently ring and this will indicate that the automobile being operatedbr towed by an unauthorized person. It will therefore be seen that the driver ol' the automobile canoperate without the signal being sounded but that whenthe owner leaves the car and removes the key` the signal will be put inI condition tor use and cannot be prevented from being operated until the key is returned to its proper place.

7What is claimed is:

A circuit closer tor vehicles comprising a casingotl insulating material, a single pair ot contacts located within said casing at opposite sides .thereof and having threaded stems extending therethrough and carrying binding nuts for connection oit coiuluetors therewith, a rotary member ournalcd through one side ot the casing between those sides equipped with said contacts, means tor continuousl)7 rotating lthe rotary member during operation of the vehicle, resilient arms projecting laterally in opposite directions from said rota-ry member, and liv balls on the ends ot said resilient arms into the path ot which the contacts extend.

ln testimon37 whereof I hereunto afiix my signature.

JOSEPH l). SCHULTZ. 

